Siemens SINUMERIK 840D sl Series Diagnostics Manual page 678

Overview of Alarms
205005 <location>Cooling system: Cooling medium flow rate too low
Reaction: NONE
Acknowledge: NONE
Cause: Cooling system: Alarm - flow rate has fallen below the alarm value
Remedy:
205050 <location>Parallel circuit configuration: Pulse enable in spite of pulse
inhibit
Reaction: OFF2 (NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge: IMMEDIATELY
Cause: A power module signals that the pulses are enabled although the pulses are inhibited.
Fault value (r0949, decimal):
Number of the power module involved.
Remedy: The power module is defective and must be replaced.
205051 <location>Parallel circuit configuration: Power module pulse enable
missing
Reaction: OFF2 (NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge: IMMEDIATELY
Cause: For one or several power modules, the pulses were not able to be enabled.
Fault value (r0949, decimal):
Number of the power module involved.
Remedy: - acknowledge power module faults that are still present.
- inhibit the pulses of the power module involved (p7001).
205052 <location>Parallel circuit configuration: Impermissible current
dissymmetry
Reaction: NONE
Acknowledge: NONE
Cause: The deviation of the individual currents of the power modules exceeds the alarm threshold
specified in p7010.
Alarm value (r2124, decimal):
1: Phase U.
2: Phase V.
3. Phase W.
Remedy: - inhibit the pulses of the faulted power module (p7001).
- check the connecting cables. Loose contacts can cause current spikes.
- the motor reactors are non-symmetrical or faulty and must be replaced.
- the CTs must be calibrated or replaced.
205053 <location>Parallel circuit configuration: Inadmissible DC link voltage
dissymmetry
Reaction: NONE
Acknowledge: NONE
Cause: The deviation of the DC link voltage measured values exceeds the alarm threshold
specified in p7011.
Remedy: - inhibit the pulses of the faulted power module (p7001).
- check the DC link connecting cables.
- the DC link voltage measurement is incorrect and must be calibrated or renewed.
205055 <location>Parallel circuit configuration: Power modules with different
code numbers
Reaction: NONE
Acknowledge: IMMEDIATELY
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005